Summary
Introduction There are limited data on how patients with pre-existing psychiatric disorders fare after sustaining a traumatic brain injury (TBI). The purpose of this study was to evaluate the impact of pre-existing psychiatric illness on clinical outcomes after TBI. Methods A retrospective review was conducted at a regional level 1 trauma center of patients who suffered a TBI between 2012 and 2020. Propensity scores were used to match patients with psychiatric disorder 1:1 to controls. The matched population was used in analyses. Results Totally, 5343 patients sustained TBI in the study period of which, 977 (18%) had a pre-existing psychiatric disorder. These patients had 1.6 times longer hospital length of stay (LOS) and 1.2 times longer ICU LOS, though days on a ventilator were not longe
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